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Handan Yongnian Hongji Machinery Parts Co., LTD.,
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Grade 8.8 Black High Strength Hexagon Socket Head Screws
Product name：ISO7380 pan head hexagon socket bolts 8.8
Head type：Pan head
Packing：Cartons+plastic Bags
Delivery time：5-15 Days
Port：Tianjin Port
Payment term：T/T
Standard：DIN
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Description
Product Dimensions
d M3 M4 M5 M6 M8 M10 M12 M16 P Pitch 0.5 0.7 0.8 1 1.25 1.5 1.75 2 a Max 1 1.4 1.6 2 2.5 3 3.5 4 Min 0.5 0.7 0.8 1 1.25 1.5 1.75 2 dk Max 5.7 7.6 9.5 10.5 14 17.5 21 28 Min 5.4 7.24 9.14 10.07 13.57 17.07 20.48 27.48 e Min 2.303 2.873 3.443 4.583 5.723 6.863 9.149 11.429 k Max 1.65 2.2 2.75 3.3 4.4 5.5 6.6 8.8 Min 1.4 1.95 2.5 3 4.1 5.2 6.24 8.44 s Nominal 2 2.5 3 4 5 6 8 10 Max 2.08 2.58 3.08 4.095 5.14 6.14 8.175 10.175 Min 2.02 2.52 3.02 4.02 5.02 6.02 8.025 10.025 t Min 1.04 1.3 1.56 2.08 2.6 3.12 4.16 5.2 Minimum tension load(N) 8.8Grade 3220 5620 9080 12900 23400 37100 53900 100000 10.9Grade 4180 7300 11800 16700 30500 48200 70200 130000 12.9Grade 4910 8506 13800 19600 35700 56600 82400 154000 Product Details
There are many types of screws, one is called hexagon socket screws. When purchasing, the salesperson will also ask you which type to choose. Originally, there are many classifications of hexagon socket screws.
There are several types of hexagon socket screws
1. There is a type of hexagon socket screw called pan head. After the screw is installed, its head protrudes on the surface, which makes it more convenient to screw the screw later. This product can be seen on some household appliances.
2.There are countersunk head hexagon socket screws, which means that it will not protrude from the surface after screwing, and it will not affect the appearance. However, if there is a problem that is difficult to screw when screwing, the screw cannot be started.
3.There are also cylindrical head hexagon socket screws, which are similar to the second type of screws. They are relatively strong and require a wrench of the corresponding specification to remove the screws. Generally speaking, they are used on machine tools.
The screw is rusted and can't be unscrewed, what should I do?
In life, many friends have encountered similar problems. Once the screws are rusted, no matter how much effort is used, they cannot be unscrewed. Because the screw is exposed to the air, if the surrounding environment is relatively humid, after a long time, it is prone to rust. In fact, don't use brute force, you need to master the skills of screwing.
Tap it first, tap the corroded screw with a wrench, and tap the handle lightly, because if the corroded part is loose, it can be unscrewed later.
If it still doesn't work after tapping, you can drop a small amount of oil, and then rotate it gently with the wrench a few times. If you don't have oil at home, you can also use Coke because it will remove rust.
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About Us
FAQ
1.You are a manufacturing company or trading company?
We are a fastener manufacturer, and our main products are Bolt, Nut, Screw, Anchor and Washer. Meanwhile, we are also a fastener trader with many years experiences in domestic and international market.
2.What quote do you offer?
We offer EXW, FCA(Guangzhou, Foshan, Yiwu, Shanghai, Wenzhou, Urumchi, and many other cities), FOB, CIF, CFR, DAP, DDP sea shipment terms.
3. Can you provide the necessary customs clearance documents
Yes. We are a legal and compliant enterprise of the People's Republic of China, having the formal import and export qualification. FORM E, CO, Invoice with embassy certification are all available for our order.
4.How pay?
T/T, Alibaba Online Payment, Paypal are all available.
5.How transport?
The most common means is sea shipment, if the order quantity is great, this means is the best.
But if the order quantity is little, we advise the air express or air transportation.
Of course, the land transportation is also OK.
Door to Door is also available.
6.Can I order a small list ?
Of course you can. We offer the samples service.
7.Can we print our own logo ?
Yes. We offer the customized service based on a big quantity. OEM and ODM are OK.
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Product name：ISO7380 pan head hexagon socket bolts 8.8
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Port：Tianjin Port
Payment term：T/T
Standard：DIN
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The company's main products cover bolts, nuts, anchor, screws, washers and customized parts, casting parts, built-in fitting parts and steel